Honing machine



March 2, 1943. C A', FULMER l HONING MACHINE Filed Jan. 29, 1942 2 Sheets-Sheet 1 INVENTOR. ['zajes ll'ulm er March 2, 1943.v c. A. FULMER HONING MACHINE Filed Jan. 29, 1942 2 sheets-'sheet 2 INVENTOR. BYChfzes a Fazmef @JMW/5MM Patented Mar. 2, 1943 UNITED STATES PATENT OFFICE HONING MACHINE Charles A. Fulmer, Waukegan, Ill.

Application January 29, 1942, Serial No. 428,759

9 Claims.

The present invention relates to honing machines and is particularly directed to improvements in limit stops for protecting the reciprocated honing tools, or other machine parts, from damage due ot breakdown or failure of the automatic control systems for the reciprocated tools to stop said tools at a predetermined limit of motion within the work to be honed.

An object of the invention is to provide an adjustable and interchangeable limit stop for honing machines having actuating means associated with their honing tools for vertically reciprocating said tools within varying, predetermined limits of motion, so that said machines may be protected when they are set to reciprocate their honing tools between desired limits of motion.

Another object of the invention is to provide an interchangeable limit stop which may, with only minor changes, be tted to all types of vertical honing machines and is adapted to permit normal operation of the honing machine to which it may be attached becoming eiective only in the event of a breakdown of the machine which might otherwise cause damage to the honing tool, a machine part or the work operated upon.

Another object of the invention is to provide a limit stop which may be adjustably positioned at any point along the length of a reciprocating and rotating honing machine spindle and which is adapted to come in contact with the machine table or bushing therefor to prevent the movement of a honing tool attached to the spindle beyond a predetermined position within a cylinder held on said table.

A further object of the invention is to provide a simplied and economical limit stop which may with slight modification be attached to different types of honing machines.

A still further object of the invention is to provide an adjustable and detachable limit stop which when attached to the reciprocated spindle of a honing machine is effectively clamped to said spindle against any normal force exerted thereon and utilizes said force to more securely clamp itself to said spindle.

Another object of the invention is to provide an adjustable limit stop for the general type of honing machines which have actuating means associated with their honing tools for vertically reciprocating said tools within varying, predetermined limits of motion and cooperating with fixed Work supporting tables, so that the machine parts and the work may be protected when the lowermost limit of tool travel is set at any vertical position within the tool reciprocating range relative to the fixed position for the work operated upon.

Another object of the invention is to provide a safety limit stop which is adjustable upon the reciprocated, tool carrying spindle of a honing machine to any desired position throughout the length of said spindle, and which acts as a physical means for determining the lower limit of spindle travel without changing thev position of a fixed work table and even though the spindle is not near its lowermost limit of motion.

Other objects will be apparent from the following specification and drawings in which:

Fig. l is a fragmental, side elevational View of a honing machine with my limit stop positioned thereon, parts thereof being shown in crosssection.

Fig. 2 is an enlarged cross-sectional view of the limit stop, parts thereof being shown in side elevation.

Fig. 3 is a plan view of the stop shown in Fig. 2.

Fig. 4 is a cross-sectional view taken on line 4 4 of Fig. 2.

Fig. 5 is a perspective view of the guide for my stop.

A typical honing machine upon which I prefer to attach my limit stop comprises a means for reciprocating a rotating spindle of said machine in a vertical, axial direction. The limits of motion for the working cycle of said spindle may be varied between two maximum limits by adjusting the control mechanism of the spindle reciprocating means. This machine also has provided thereon a rigid or stationary work table adapted to hold the cylinder to be operated on in axial alignment with the spindle and the honing tool depending from the lower end of said spindle.

The preferred embodiment of a machine associated with my limit stop consists of a base 8 having a frame 9 mounted thereon, said frame carrying at its upper end a housing III which encloses the upper end of a splined spindle II and the control mechanism for automatically reversing the movement of the spindle. The spindle is constantly rotated by means of a motor I2 mounted on the frame and connected to said spindle through a bevelled gear I3 meshed with a gear I4 mounted on the motor shaft. The bevelled gear I3 is xedly mounted for rotation on the bottom of the housing I0 and freely engages the splined spindle II so that the spindle has axial movement relative to the said gear. The upper end of the spindle is connected to a piston I5 by means of a shaft I6. The reciprocation of the `from aV sump tank'2'9'and introduces,

vpiston I5 within its cylinder I 'I is accompanied at a predetermined depth to prevent its damagbythe alternate introduction of uid under presing the closed end cylinder in the event that sure into the upper duct I8 and the lower duct closed end cylinders are being honed, or if open I9 connected to pressure and exhaust lines 20 and end cylinders are being honed, then to prevent 2|, respectively. The lower end of the spindle damage of the base of the machine and the is connected through universal joint 22 to a suithoning tool. able honing tool 23 which is in axial alignment The structure of the limit stop 38 is most clear- With the spindle and is adapted through said ly shown in Fig. 2 and consists of a split sleeve connection to be rotated and reciprocated axially 39 separated into two independent segments 4l) within a cylinder 24 to be honed. rEhe cylinder 1Q and 4L The spindle Vlias Aav tapered body porillustrated is opened at both of its ends but'the tion which has a greater effective thickness at machine shown may also operate upon closed end its top portion than 'at `'the' "threaded end 40. cylinders for airplane motors in a highly efficient Itv Will therefore be seen that the split sleeve manner. The cylinder 24 is clamped to the unl" 'itapers downwardly in the direction of movederside of a work table 25 which is rigidly mount-.S 15 ,111161111 "of, the honing tool as it moves from the ed to the base 8 of the machine. Ahonefbush; upper to the lower end of the cylinder 24 to be ing 26 is mounted upon the table andpositio'ned Y hbried- Srundng the Sleeve is a yoke 42 in alignment With the Cylindelti thes'llOHIltQQlf Wllls; aflplpentary tapered Opening 43 and an opening 21 formed in the table. Y K formed centrally therethrough. The opening The reciprocation of the piston I5 within the 20 therefore converges outwardly from a minimumV Vylinder I'I may be accomplished hydraulically t tt h f by a motor dni/enen pump "zawliicnt huid pressurei,rthrough a reverse valve 3`, teth'ellis Zl and 2|.Y VFluid under ressf're'isintioduizedto the Areverse valve 3D' throughlinef 3| Q said li alternately introducing said pressure liidJ 2n and' @een liej 2 I "jt,v 'reiirocateirhe isi-lb actuate the lhoning tool betweefts lit tin' during, tli'wrkihe''yklf ,reverse Ya e is automatically moved by a control rod 3,2 J' nalled in the 'housing I'Uandfcnriec'td'" f` reverse valve by "an arm, 3 3'.` 'Ifh Yc() has for this purpose anipperstop 34 stop e5 vuureaderi` totnef 1 rod. f fre vereally @dienste-h1@ theme11 "Th S, LD er@ alternately "engaged" a 4 shoulderf W the spindle |`I lt therebyrev'erse the mevr* o ,Said Spindle eed, elSo .the hsmine teob tuat'ion of the' Huid reverse Jyfalv'elfll 'The valve may also alternately 'return 'discharged tote@ Sump taak .29 through @wie line 3 the'fli'ne's'; '2p and zrwrlentny aiperntiy acfas drain'lines for the return fluid. 'v A' To permit withdrawal ofthe honing, toohfrom A the cylinder to 'an'upper inoperative p'ositi shown in Fig. 1, the upper limit stop 3 video "el reduced' may pore ukfe "e ensieessqirrh ,stop "3 ma ieuyg'rdaed e moi/tre the@ sagement' winitn"shoeidersf spin le'wouldcontinue'ifts'upward me fil' dnshoilldlSBQJW Cy g actuated,YY stops'th'eiachin' in any Weir known mnner: It willy "therefore, bei understood rrhh-1 v theffregomg that the h'iirdemac ii tr. ed functions tof reciprocate fa' ing within 'adjustable"pred-eeenedlmvts of tion. n *I My limit Stop 'isreenerally indicated. numeral 3 8v ariol'it is`d' position thereby tending to force the sleeve 40 into the tapered opening 43 on the yoke 42. This tendency of said parts is similar to that employed by tightening the nut 44 on the sleeve 40 and tends to draw the sleeve 40 further into the yoke thereby increasing the clamping action and more rigidly fastening the stop to the spindle.

To attach the limit stop 38 to the spindle of a honing machine, the honing tool is removed from the lower end of the spindle by disconnecting the upper end of the universal joint 22 from an enlarged portion formed on the lower end of said spindle. The complementary sleeve portions 40 and 4I are then positioned around the spindle and the yoke 42, with the bearing 4l, housing 50 and nut 48 in assembled position thereon, is moved over the end of the spindle and around the sleeve portions. Nut 44 is then threaded to the sleeve, and loosely drawn up so as to hold the parts together and the entire stop may then be moved to its desired operative position on the spindle and the nut 44 then tightened to clamp said stop to the spindle. The end 59 of the tail v'piece 5B is then inserted in the slot of guide 6i) and said guide fastened to the machine frame 9 by bolt 6I. It will be noted that the opening 43 in the yoke has a diameter greater than the enlarged end of the spindle Il so that said sipndle end can be passed through said opening during assembly of the stop. It is contemplated that said opening be made large enough to pass over a great number of enlarged spindle ends, the thickness of the tapered sleeves being varied to accommodate said yoke opening to various spin- .Adle diameters. In other words, in various install lations where machines are provided with different spindle diameters, sleeves having different `sleeve thicknesses will be used to provide a constant exterior sleeve diameter for cooperating with a standardized opening in the yoke,

W'hat is claimed is:

l`. In a honing machine the combination of a work table for fixedly holding a cylinder, a rotating spindle, means for vertically reciprocating said spindle, a honing tool in axial alignment with the spindle and fastened to the end thereof for movement within the cylinder, and an adjustable limit stop fastened to the spindle and comprising a sleeve surrounding said spindle and having a downwardly tapering body, a yoke having an upwardly tapering opening formed therein for receiving the sleeve, means associated with the lower end of the sleeve for contacting the yoke and for drawing said sleeve into said opening to rigidly clamp the stop to the spindle, and abutment shafts carried by the stop for engagement with the work table when the honing tool is in a predetermined position within the cylinder.

2. In a honing machine the combination of a work table for i'lxedly holding a cylinder, a rotating spindle, means for reciprocating said spindle, a honing tool in axial alignment with the spindle and fastened to the end thereof for movement within the cylinder, and an adjustable limit stop fastened to the spindle and comprising a sleeve having a tapered body surrounding said spindle, a yoke having a tapered opening therethrough for receiving the sleeve, means for drawing said sleeve into the opening to clamp said stop to the spindle, a non-rotatable housing mounted on the yoke, and abutment shafts carried by the housing for engagement with the work table when the honing tool is in a predetermined position within the cylinder.

3. In a honing machine the combination of a frame, a Work table on the frame and adapted to xedly hold a cylinder, a rotating spindle on the frame, means for vertically reciprocating said spindle, a honing tool in axial alignment with the spindle and fastened to the end thereof for movement within the cylinder, a guide on the frame, and an adjustable limit stop fastened to the spindle and comprising a sleeve having a tapered body surrounding said spindle, a yoke having a tapered opening formed therethrough for receiving the sleeve, means for drawing said sleeve into the opening to clamp said stop to said spindle, a non-rotatable housing mounted on the yoke, a tail piece on the housing freely engaged by the guide, and abutment shafts carried by said housing for engagement with the work table when the honing tool is in a predetermined position within the cylinder.

4. 1n a honing machine the combination of a. frame, a work table on the frame and adapted to fixedly hold a cylinder, a rotating spindle on the frame, means for vertically reciprocating said spindle, a honing tool in axial alignment with the spindle and fastened to the end thereof for movement within the cylinder, a guide on the frame, and an adjustable limit stop fastened to the spindle and comprising a split sleeve having a downwardly tapered body for surrounding the spindle, and exterior screw threads formed in its bottom portion, a yoke having an upwardly tapered opening formed therethrough for receiving the sleeve and a groove formed therein concentric with the opening, a bearing in the groove, a housing engaging the bearing, a bearing plate fastened to the housing and adapted to clamp the outer race of said bearing to the housing, a nut on the lower end cf the yoke and in engagement with the inner race of the bearing, a clamping nut on the sleeve threads and in contact with the yoke bearing nut, said nut being adapted upon tightening to draw the sleeve into the opening of the yoke to clamp the stop to the spindle, and abutment shafts fastened to the housing and adapted to Contact the table when the honing tool is in a. predetermined position within the cylinder.

5. In a honing machine the combination of a frame, a work table on the frame and adapted to xedly hold a cylinder, a rotating spindle on the frame, means for vertically reciprocating said spindle, a universal joint on the end of the spindle, a honing tool fastened to the joint and in axial alignment with the spindle for movement within the cylinder, a guide on the frame, and an adjustable limit stop fastened to the spindle and comprising a split sleeve having a downwardly tapered body for surrounding the spindle, and exterior screw threads formed in its bottom portion, said sleeve having a slightly greater inside diameter at its lower portion than the outside diameter of the universal joint, a yoke having an upwardly tapered opening formed therethrough for receiving the sleeve and a groove formed therein concentric with the opening, a bearing in the groove, a housing engaging the bearing, a bearing plate fastened to the housing and adapted to clamp the outer race of said bearing to the housing, a nut on the lower end of the yoke and in engagement with the inner race of the bearing, a clamping nut on the sleeve threads and in contact with the yoke bearing nut, said nut being adapted upon tightening to draw the sleeve into the opening of the yoke to clamp the stop to the spindle, and abutment shafts fastened to the housing and adapted to Contact the table te said Spindle. a nen-rotatable.nousoemounted.

the yolsei a tait-1, niece on the housing freely @managed byv the guide, and abutment. shafts cartied by seid. housing for engagement with the we kttehle en thehonine too in a mieletre position within the.

'le 1n. e 1 1v 's stop for; honing; maehines having a tool carrying spindle mounted onY the. 'frame thereoi for verticallyv reciproeatingy and` rotating movement relatiye, to. a xed work table thecom;A hination of a guide on the frame, a split sleeve bagging a downwardly tapered body for surround-- ing the spindle, and exterior screw,` threads formedV in its bottom portion,v a yokev having an upwardly tapered Opening formed therethrough for reoeiving the sleeve andiv a groove formed therein concentric with, the opening, a bearing in they groove, a, housing'` engaging the bearing; a bearing plate fastened to the housing`V and adapted to clamp-the outerl race of. said .bearing tothe housing, a nutv on the lower end of the yoke and` inengagernent with the. innerrace of the bearing, a .clamping nut; on theisleevel threads and ir: contant with the yoke bearingnut,A said nut. being4 adapted upon tightening to draw the sleeve intothe opening of theyoke to. clamp; the stopv` to the Spindle, and. abutment shafts fastened to thel housing andg adaptedV to contact the table when the honingl tooLis 'in a; predetermined DQSiton within the cylinder.

8,.` Inja honing machine the combination ofaa worktahle for xedly holding a work piece, etV

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rotating. snindieL means en reeinreeetlngnsaisi snindleiahorine; teo! in alignment vriththe' spindle and iasteneete the end thereof ren: eriYe. movement 0n the W k" nieces-nd at, atie i b' a tooltarryne Spindle mounted on the there f.- for ve. kelly reipreeatine and tot me Inentrela. te te ai fixed Work: teme and u; rsa1; ioinfbetweenthe tool ,df the spine the evmbination efeuide the: sleeve having a downwardh'ftapete.1\A beds: mi: Surrounding the Spindle and exterior Shreve threads. formed in its bottom portion Said; Sleen@ hei/ille e. Slightly-v efeaterf inne-diameter at', its, lower prtion than the outside diameter off'trhe universai j oint a yoke hay' an unwardly taf pered opening formed; therethno gh fonrecei the sleeve and al groove forfrned` ihlfexry concientrio with the opening, a; bearing in the-` gyieoye; a housing engaging the bear-ina a. bearing: plete fastened to the housing and adapted to( clan-1p the outer race of saidv bearing to, the. housingj aY nul on: the lower end of the yokeapdgi gisement with the innerv rase Oihef be ,t sa@ Clamping nut 0n thesleeve threads and-in 0,1m-v

tact, with the` yoke beaune. nut sai@ nut! being adailgted upon tightening. to draw the sleeve; into the eneeinefofthe yoke toclampfthefstopfto the spindle,V and abutment. shafts fastened; to the heusine and adapted; tol Contact the table when the honing tooiis in a, predetermined position Within the cylinder. t

eine.` spilt? 

